Improvement in grinding-mills



P. EVANS. n Grinding-Mills.

- N0. 143,816. Patented Oct. 21,1873.

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Attorneys.

Wimesss AM. mam-umoam Hill, 622 M X (assMI/rs Macm/ 7 UNITED STATESPATENT Orrron.

rnron EVANS, on NEW YORK, n. Y.

IMPROVEMENT IN GRINDING-MILLS.

Specification forming part of Letters Patent No. 143,816, dated October21,1873; application filed August 4, 1873.

To all whom it may concern:

Be it known that I, PRIoE Evans, of the city, county, and State of NewYork, have invented a new and Improved Grinding-Mill, of whichthe-following is a specification:

The object of my invention is to construct a mill for grinding grain andthe like which can be cheaply made, and operated by a simple arrangementof driving machinery.

The invention-will be first fully described,

and thenclearly pointed out in the claim.

Figure l is a longitudinal sectional elevation of my improvedgrinding-mill, taken on the line 2, z of Fig. 3. Fig. 2 is a section onthe line a; m of Fig. L Fig. 3 is a sectional bridge-trees of which is ahorizontal shaft, D,

carrying the running stone E, which over hangs the bridge-tree F, andruns in a case, G, in the, upper part of which is a spout, H, for theescape of hot air, and in the lower part is a spout, I, for the escapeof the meal. In front of the runner E is the stationary stone J,standing face to face with it. Said stone J is pivoted at its horizontalaxis by trunnions K, supported in the arms of the crotched standard L,and said trunnions are connected to blocks M in the slots N. of thestone, and

provided with adjusting-screws O, by which they can be shifted forwardand back to balance the stone. The crotched standard is capable ofturning horizontally on the vertical axis Q, which, together with thetrunnions K,

constitutes a universal joint, on which the bed stone accommodatesitself to the runner. The standard L is arranged on a base, Q, which isarranged on the frame A so as to slide toward and from the runner, andis provided with the adjusting-screw R and hand-nut S for setting thestone to regulate the grinding; also, to move the stone backward awayfrom the runner, so that it can be turned face upward, as in Fig. 4, fordressing it. U is the feed-shoe under the hopper V. It delivers thegrain into the eye of the stationary stone, in which there is aprojection, f, of the shaft, with a coarse spiral screw-thread or worm,which con veys the grain to the runner, where it is met by the radiatingdistributing-plates g on the runner, which work it along between thestones and distribute it equally. The shoe is agitated by a tappet, h,on the shaft;

It will be seen that the construction is very simple and cheap, and thatthese mills can be geared by a direct belt from the driving-shaft on thepulley upon the shaft D in the most simple manner.

One essential advantage of this arrangement over the common mills is,that the spindle or shaft of therunner has not to support the weight ofthe stone on its end or step, but only the necessary pressure forgrinding.

The hopper-supports i are made removable, so as to be taken out of theway when the stones are to be dressed.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent-- A fixed stone, J, combined with a standard, L, asdescribed, the former turning vertically in and horizontally with thelatter.

PRICE EVANS.

Witnesses:

T. B. MosHER, G. SEDGWICK.

